What is it in genetics?
Chiasma is a point of contact between sister chromatides, which is formed during meiosis, a process of cellular division and replication used by a wide range of organisms. In chiasm, chromatids can exchange genetic information, resulting in a new combination of genetic material. When chromatids separate and become sister chromosomes, they will contain a different mixture of genetic material than their superior chromosomes. This allows organisms to develop genetically, create new features and pass them on descendants. Chiasm is formed during meiosis I, the first phase of meiosis, when paired chromosomes exchange genetic material before division into two cells, each containing half of the genetic material of the original parent cell. Chiasmata plays an important role in the process of replication of genetic material.
Basically, by mixing the genome of the exchange of the angle on chiasma, organisms are able to generate theoretically endless combinations of new features. Some of these combinations do not work fromvarious reasons and are not passed. Others have proved to be successful and as a result they begin to spread. Over time, organisms can undergo main evolutionary shifts as their genomes change and some individuals thrive as a result of their inherited characteristics.
occasionally, errors may include chiasma during the division. If two daughter chromatids are separated during meiosis, the product of this particular cell division will have an odd number of chromosomes. The replacement of genetic material at this point may also be garbled or confused, resulting in the transmission of harmful features or ending with some cells with a surplus of genetic material, while others may be a mischievous genetic material. In some cases, this may be harmful because missing or excess material can be important and could express themselves in the form of a genetic defect.
people can see chiasma with the help of a microscopeIE during the meiosis process when chromatids are connected together in a distinctive X -form. This shape is also replicated on charts and charts depicting meiosis. The term "chiasma", which comes from Greek, generally concerns intersection or crossing. This term is also used in anatomy to indicate nerve bundles at the intersection point, such as optical chiasm, where optical nerves go through.